forces

Question 1

Lucy boards a crowded bus as it sits in the station. There are no available seats, so Lucy stands in the center aisle next to a support pole. As the bus starts moving forward and picks up speed, Lucy holds the pole tightly to avoid falling over backward.
While the bus is speeding up, what is the direction of the total force (if any) on Lucy?

Answer 1

forward

Question 2

Lucy boards a crowded bus as it sits in the station. There are no available seats, so Lucy stands in the center aisle next to a support pole. As the bus starts moving forward and picks up speed, Lucy holds the pole tightly to avoid falling over backward.
During this time, what is the direction of the total force (if any) on Lucy?

Answer 2

The total force is zero

Question 3

The bus comes to a sudden stop at a red light, and Lucy grips the pole tightly to avoid falling over forward.
During this time, what is the direction of the total force (if any) on Lucy?

Answer 3

backward

Question 4

The net force on a moving object suddenly becomes zero and remains zero.

The object will?

Answer 4

continue at a constant velocity

Question 5

In the absence of a net force, an object can be?

Answer 5

at rest or in motion with a constant velocity. That means there CANNOT be any acceleration

Question 6

While an elevator traveling upward slows down to stop, the normal force on the feet of a passenger is _________
her weight

Answer 6

smaller than

Question 7

While an elevator traveling downward slows down to stop, the normal force on the feet of a passenger is _______
his weight

Answer 7

Larger than

Question 8

when a net force is acting on an object, the object is…

Answer 8

accelerating